Which substance cannot be broken down by a chemical change?1) ammonia
2) ethanol
3) propanol
4) zirconium
Answers
Answer:
Zirconium
Explanation:
This is because if you look it up in the periodic table you cannot break it apart by a chemical.
Related Questions
What hypothesis did Miller-Urey test in their experiment?A. Organic molecules can form in a reducing atmosphere.B. Earth is a primordial soup.C. Organic molecules cannot survive in a reducing atmosphere.PLEASE HELP AS SOON AS POSSIBLE!
What gives the color and shape characteristics to flames in a fire?
What is the percent by mass of carbon in C10 H14 N2?
the valence electrons of metals jump easily to a higher energy orbital when light shines on them then they all fall emiting the excess energy as light which property of metals is explained by this?
Answers
Answer:
Molecules in food contain chemical energy that cells use to produce Adenosine triphosphate ATP. Respiration is that the method by that cell get energy within the sort of ATP. Adenosine triphosphate captures energy obtained from the breakdown of food molecules and releases it to fuel alternative cellular processes. ATP, is that the primary carrier of energy in cells. Once energy is required by the cell, it's born-again from storage molecules into ATP.
(2) CaH2 (4) NH3
Answers
Answers
2H₂ + O₂ ⇒ 2H₂O
Since the hydrogen is the limiting reagent (meaning if the hydrogen runs out the reaction stops), we need to compare the mole ratio between hydrogen and water.
The mole ratio between H₂ and H₂O is 2:2, or 1:1 (as seen on the coefficients of the balanced equation)
And so for every mole of hydrogen, it will be equal to water. Since hydrogen is 4 moles, 4 moles of water would be created.
So we use the coefficients of H₂ and H₂O in order to answer this question.
The number of moles of H2O is proportional to the number of moles of H2 as much as 4 moles
The calculation reference is the mole of the limiting reagent of the mole of H2O is based on the mol of H2
Stokiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculation of volume, mass, number, which is related to the number of ions, molecules, elements, etc.
In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example, the substance level or molecular formula of the hydrate.
- The reaction equation is the chemical formula of reagents and product substances
- A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
- In the reactionequation there are also manifestations of reagent substances namely gas (g), liquid (liquid / l), solid (solid / s) and solution (aqueous / aq).
Known variable
4.0 mol of hydrogen and excess oxygen
Asked
the balanced chemical equation
Answer
Reactions that occur:
2H₂ + O₂ ⇒ 2H₂O
The reaction coefficient shows the mole ratio of reactants and reaction products
In determining the mole of the reaction, the calculation reference is the mole of the limiting reagent or the reagent that runs out. Because here it is stated that oxygen (O₂) is reacted under excess conditions, the hydrogen ratio becomes the limiting reagent. So the determination of the mole of H₂O is based on the mol of H₂
In the equivalent equation, the mole of H₂ and H₂O is 2: 2 or can be simplified to 1: 1, so the number of moles of H₂O is proportional to the number of moles of H₂ as much as 4 moles
Excess reactant
The percentage yield
Limiting reactant
Keywords: limiting reactant, excess, reaction coefficient, the balanced chemical equation, H₂O, O₂, H₂
Answers
C₁ * V₁ = C₂ * V₂
6.0 * 455 = C₂ * 2500
2730 = C₂ * 2500
C₂ = 2730 / 2500
C₂ = 1.092 M
hope this helps!
(1) seizing the land of the lettuce and grape
growers
(2) securing passage of federal legislation to limit
immigration
(3) using nonviolent tactics such as boycotts and
hunger strikes
(4) urging growers to reduce the workforce
through mechanization
Answers
Answer:
The correct answer is option (3) "using nonviolent tactics such as boycotts and hunger strikes".
Explanation:
Cesar Chavez was a leader of American labor and civil right activists that fought to unionized migrant farm workers by the creation of The National Farm Workers Association. Cesar Chaves used nonviolent tactics to support the migrant farm workers. For instance, when Filipino American farm workers protested for higher wages in 1965, he encouraged Americans to boycott table grapes to support them; while he once performed a 24-day hunger strike in 1972 in the Santa Rita Center as a response to Arizona prohibiting boycotts and strikes by farm workers.